Drill



Aug. 3,1926. 7 1,594,913

' M. TUFTY Filed August a, 1925 5 vide a portable 0 carried by the lower Patented Aug. 3, 1926.

UNITED STATES PATENT OFFICE.

MARTIN TUFTY, 0F ENTWISTLE, ALBERTA, CANADA, ASSIGNOR OF ONE-FIFTH T0 OLAF THOMASSON, 0F

ENTWISTLE, ALBERTA, CANADA.

DRILL.

Application filed August 8, 1923. Serial No. 656,401.

This invention relates to improvements in drills, and relates more particularly to. the type of drill known as a tail drill, and the principal object of the invention is to prodrill of this character whereby pressure can be readily applied to the bit or other tool, and in the following specification the invention will be clearly described, and what is claimed as new will be set forth in the claim forming part of this specification. Fig. 1 is a front elevation of the tool in question. Fig. 2 is a side elevation of the lower portion thereof, and Figs. and i are, respectively, horizontal cross sections on the lines 3 3, and M, Fig. 1.

In the drawings, like characters of reference refer to the same parts.

The frame A of the drill may be made of. wood or other suitable material, and the same is adapted at the rear side by u g means such as nuts and bolts commonly designated C.

Suitably secured to the offset portion D of the frame A, and extending longitudinally thereof, is a casing E through which operates a crank F which is provided with any suitable handle G. The lower portion of the crank F is threaded as shown at 2, and threaded on this portion 2 is a pressure device, conveniently in the form of a nut 3 preferably circular in form, and it will be understood that the hand may readily grasp this nut and apply pressure to the bit or other tool A mounted in the stock 5 which is end of the threaded portion of the crank F. be utilized to raise the crank F and its as sociated parts.

The work rests or support 6 rests against the outer face of the frame A, and the up per portion of said rest or support overhangs the sides of the frame A as shown at The nut 3' can also.

7 as a convenient means to hold said rest or support in alignment with said frame.

Obviousl to permit of the adjustment of the rest or support 6, and a convenient means for this purpose comprises a strap 8 more or less U-shaped in form, and the ends of this strap are pivoted to the rest or support 6, by any suitable means such as the bolt 9. Suitably carried by the rear side of the frame A are a series of lugs 10 vertically spaced apart, and the rear portion 11 of the strap 8 is adapted to engage with any of the said lugs to form a catch to hold the rest or support 6 in adjusted position. The lugs 10 are shown as integrally carried by a plate 12 which is suitably secured to the frame A.

To facilitate the adjustment of the strap.

8, the upper edge a of the rear portion 11. thereof is bent outwardly and thus permits of ready clearance with the lugs 10.

E is preferably countersunk of the offset portion D of the frame A, and straps 13 passing through said off-set portion of the frame A may be conveniently employed to secure said casing in place.

It will be obvious that the crank F may be readily given longitudinal and rotary movement within the casing E to permit the tool to function.

Of course the off-set alignment more or less with the work be properly located in respect of the frame A.

What I claim is:

r In a machine of the character y some means must be provided 

